Machine for coating hose.



H. Z. COBB.

MACHINE FOR COATING HOSE.

APPLICATION FILE-D SEPT. 29, 1911.

Patented Oct. 1, 1912.

2 SHEETSSHE T 1 I INVENTOR: J; M

WITNESSES H. z. COBB. MACHINE FOR COATING HOSE. APPLICATION FILED SEPT, 29, 1911.

1,039,697, v Patented Oct. 1, 1912.

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HENRY Z. COBB, OF CHELSEA, MASSACHUSETTS.

MACHINE FOR COATING HOSE.

Specification of Letters Patent.

Application filed September 29, 1911.

Patented Oct. 1, 1912. Serial No. 651,969.

To all whom it may concern:

Be it known that I, HENRY Z. COBB, a citizen of the United States, residing at Chelsea, in the county of Suffolk and State of Massachusetts, have invented certain new and useful'Impro ements in Machines for Coating Hose, of which the following is a specification.

This invention relates to an apparatus for applying to hose a coating of rubber or analogous composition of the consistency of dough.

A hose or tubular core (which may or may not have had a textile web or covering already applied to it) is passed continuously through the machine, being first given a coating of the dough, then having a textile layer or web braided, woven or otherwise applied upon the coated hose, after which the layer is passed through a wiping die which removes the excess of coating material which has exuded through the interstices of the fabric covering, the excess of dough being caught beneath this die and collected and discharged in a. continuous stream either outside of the machine or preferably back into the reservoir or supply whence it came.

The present invention constitutes an improvement upon the apparatus set forth in my Letters Patent No. 1,002,644, granted September 5, 1911.- In that patent is illustrated a means for applying a coating of dough-like composition to the hose upon the entry of the latter into a braiding machine which braids on .a textile web directly beneath a wiping die so that theyarns as they converge cut through the mass of dough accumulated beneath such die; after which the hose passes through the die whereby the excess of coating composition is wiped off. According to my present invention the braiding is performed at a lower point relatively to the wiping die so that the yarns do not enter the mass of composition forming beneath the die but are applied to the coated surface of the hose beneath the mass of composition wiped ofl by the die, and the surplus mass is not permitted to descend into contact with the converging yarns, but is caught in an annular receptacle leading to a conduit which conducts such surplus material away from the hose. In operation, a considerable excess of coating material is applied to the hose so that asjthe yarns are braided on they force such excess of material to push its way through the interstices to the exterior thereof, such excess of material remaining there until it is wiped off by the die. Thus there is a constant circulation of the coating material from the hopper or reservoir to the hose and from the wiping die back to the hopper.

Figure l of the accompanying-drawings is a vertical mid-section of the braiding machine with the coating means applied thereto, the view corresponding to Figl of my said previous patent; Fig. 2 is a fragmentary view showing part of the coating mechanism, being an enlargement of such portion of Fig. 1. Fig. 3 is a sectional elevation of a pair of dies showing the back flow of the excess of material. 1

Referring to the drawings, A shows a familiar type of braiding machine, and B is the coating means as a whole.

The braiding machine being well known, is not shown in detail, and requires no description other than to identify the plates a b as respectively the upper and lower plates between which is the necessary gearing for driving the bobbins c c, from which bobbins the .yarns (Z (Z converge forming ashed in the well understood manner. In the machine shown, power is applied to a driving pulley e which through a clutch is coupled to the main shaft 9, from which it is communicated through gears for driving the elements of the braiding machine.

- C is the hose which is carried up through the center of the braiding machine in the usual manner, except that it first passes through the coating device; This comprises a coating chamber 71 to which the rubber composition or friction dough is fed-under suitable pressure. The supply of coating dough comes from a hopper s, whence it flows through a conduit 1", being impelled by a screw conveyer q. The hopper s has a stirrer within it the shaft o of which is driven from one of the shafts -t of the braider through sprockets and a chain u; the conveyer a is driven from the shaft 2) of the stirrer through a chain w. The means for supplying andfeeding the coating material thus described is a simple and suitable means, butmay be replaced by any other such means known in the art,

The hose is properly centered by passing through a thin tube or mandrel z' adjusted by screws 9' j and concentric with a ring die or wiper 70 which determines the thlckness of the coating composition applied to the hose.

' The coated hoseC passes up through the machine, so that the coating is partially dried by contact with theair, and on reaching the braiding point the outer web is braided upon it. In this braidin -operation the yarns as they are laid on un er tension indent themselves into or through the layer of composition, so that the composition is, forced to exude through the interstices of the braided web. It results that the composition'is caused to permeate the fibers of the yarns to a considerable extent. The exuding composition forms immediately after the braiding a rough or irregular exterior .co'ating partially covering the yarns, while leaving them partially exposed. The hose then passes up through the compound die D, which is of novel construction, and includes two successive dies of slightly different sizes of opening, namely, a lower or preliminary die Z and an upper or wiping die m. These dies are preferably .formed in one piece or casting, as shown best in Fig. 2. The lower die Z is designed and adapted to rub or smooth the coating in order to force the coating material into all the interstices of the braided web,but is not intended to remove or wipe off any excess of coating material.

For this purpose it is preferably made with a flaring or trumpet-shaped mouth Z, which tapers inward in such manner as to have no scraping effect upon the coating, and diminishes to such diameter as will embrace the coated hose closely enough to rub or smear the coating, but without removing any excessthereof. This smaller portion of the die preferably continues cylindrical for a sufficient ,length to effectively perform its 40 smoothing and rubbing function. The ascending hose after being smoothed by the die Z then passes through the upper die m, which has its opening of a smaller diameter, being only sufficiently large to permit the hose to pass, while closely embracing it so as to rub or wipe or scrape off any excess of the coating material, and thereby leave only such material as is confined within the interstices of the braided web. The excess of material thus scraped or wiped ofi accumulates beneath the die m and flows down upon and around the upper part of the die Z in a manner shown approximately in Fig. 3, and descends thence through a spout n by which it is carried away, To bestaccomplish this result it is preferable that the space 0 between the upper and lower dies and surrounding the upper end of the lower The surplus coating material discharged through the spout n might be utilized in any suitable way, but preferably it is returned to the hopper .s' in such manner as to main- For this purpose impelled to the outlet of the conveyer,"

whence it is forced through a tube y back into the hopper s. The conveyer E has the usual revolving screw y, and is shown as driven by a chain a from a sprocket on the shaft 2; The coated hose C passes up beyond the die m and is carried away and coiled and transported in any known manner. If desired, the converging yarns may be guided by a ring or other suitable guide at F, just above the -point at which the braiding is accomplished.

The machine provided by my present invention may be used for performing substantially the process set forth and claimed in my Patent No. 1,002,644. The form of machine here illustrated, however, has the advantage that the braiding is more readily performed, since the yarns do not have to cut their way into an accumulating mass of coating material, but merely into a heavy coating thereof; and the excess of coating material wiped off from the hose is automatically disposed of by being carried out of the machine or preferably back into the supply of coating material.

I claim as my invention 1. An apparatus for making hose or the like, comprising means for applyinga coating of plastic material upon the hose, means for forming a tubular textile web upon the hose so coated, and a die through which the hose subsequently passes, said die adapted to spread the coating material over the emrior of the web without removing an excess of such materiaL- 2. An apparatus for making hose or the like, comprising means for applying a coating of plastic material upon the hose, means for forming a tubular textile web upon the hose so coated, a die through which the hose subsequently passes, said die adapted to spread the coating material over the exterior of the web without removing an excess subsequently passes, said die adapted to spread the coating material over the exteriorof the web without removing an excess.

of such material, a second die adapted to wipe'ofi from the hose an excess of such material, and means for collecting such excess and conducting it away from said die.

4. An apparatus for making hose or the like, comprising means for applying a coating of plastic material upon the hose, means for forming a tubular textile web upon the hose so coated, a wiping die adapted to subsequently remove the excess of such material from the hose, and means for conducting away such excess from said die.

a 5. An apparatus for making hose orv the like, comprising means for applying a coating of plastic material upon the hose, means for forming a tubular textile web upon the,

hose so coated, a wiping die adapted tosubsequently remove the excess of such material from the hose, means for conducting I away such excess from said die comprising an annular chamber receiving such excess,

-means for subsequently ing witnesses.

and a conduit chamber.

6. An apparatus for making hose or the like, comprising means for ap lying a coating of plastic material to the ose, a hopper for supplying the coating materialthereto,

orming a tubular leading away from such textile web upon the coated hose, a wiping die adapted to remove the excess of such material therefrom, and means for conducting such excess back to said hopper.

v In witness whereof, I have hereunto signed my name in the presence of two subscrib- HENRY ZQCOBB. Witnesses:

ARTHUR C. FRASER,

FBEn WHITE. 

